10 results about "Voice coil" patented technology

The present invention relates to the technical field of electroacoustic products. Disclosed is a miniature speaker. The miniature speaker comprises an upper housing and a lower housing combined together. A vibration system and a magnetic circuit system are accommodated in the space defined by the upper housing and the lower housing. The upper housing is disposed close to the vibration system. The miniature speaker also comprises a hearing-aid voice coil. The hearing-aid voice coil is fixed to the upper housing and is located at the inner side of the upper housing. The miniature speaker of the present invention solves the problem of poor acoustics caused by collision of a lead wire of a vibrating voice coil with a hearing-aid voice coil of a miniature speaker in the prior art, and the miniature speaker of the present invention has good acoustic performance and a better hearing-aid effect.

The invention discloses a conductive elastic wave for a loudspeaker, which comprises an elastic wave main body, wherein a wave peak, a wave trough and a voice coil are arranged on the elastic wave main body; and the cross section is of a wave structure. The conductive elastic wave for the loudspeaker is characterized in that two or a plurality of FPCs (Flexible Printed Circuit) are arranged on the wave peak and the wave trough of the elastic wave; one end of each of the FPCs are connected with the voice coil; a connecting end is arranged at the other end of each of the FPCs; a connecting power supply stretches out from the outer side of the elastic wave main body; the FPCs are connected with the elastic wave main body integrally in the way of hot-pressing, or penetration or sewing; and two of the FPCs are arranged vertically on the surface of the elastic wave. The thickness of each FPC is 0.01mm-2mm, and the conductive elastic wave for the loudspeaker has the advantages of simple structure, low production cost, good effect and the like.

A travel banjo optimized for sound quality, portablity and ruggedness. The neck, fingerboard and string scale are identical to a regular banjo. The neck is attached to the body with a thumbscrew. The body consists of a front and back plate which are fastened together mechanically. A commercial drum head is tensioned by the force of the front and back plates being drawn together, applying pressure to the head and the tone ring. A string clamp is attached by a thumbscrew to retain the strings and bridge in when the neck is removed. The strings are attached to string posts at the end of the neck travelling over the bridge to a set of rollers, which redirect the string path to the rear where the tuning mechanisms are mounted in a protected area. The head and bridge are similar to a regular banjo to provide an authentic banjo sound.

An ultrathin loudspeaker-type radiator comprises a heat conduction chamber, a vibrating diaphragm, a voice coil and a magnetic apparatus, wherein the magnetic apparatus generates contrary magnetic loops at two side edges of the voice coil, and the magnetic loops are vertical to the side edges, the voice coil divides the heat conduction chamber into two air chambers, side walls of the two air chambers both have air vents, the voice coil and the vibrating diaphragm are fixed into one piece, a terminal of the voice coil extends out of the heat conduction chamber and is used for receiving input of alternating current, and the magnetic apparatus acts with the alternating current in the voice coil to generate an Ampere force to drive the voice coil and the vibrating diaphragm to vibrate in the heat conduction chamber so as to exhaust or intake air in the two air chambers from the correspondingly air holes. The invention adopts the magnetic apparatus which generates contrary magnetic loops, vertical to the two side edges of the voice coil, at the two side edges of the voice coil to adapt to a condition that current in two side edges are contrary, the intensity of a magnetic field of the magnetic apparatus in the horizontal direction is enhanced, stronger magnetic performances under the same power are achieved, the vibrating strength of the voice coil is improved, the heat radiation capacity of the radiator is improved, and the technical support is provided for an ultrathin structure.

The invention relates to the technical field of electronics, and discloses a vacuum capacitor capable of changing capacitance, which comprises an insulating rod, an upper shell, a lower shell, a fixed electrode, a movable electrode, a magnet, an insulating shell, a voice coil motor coil, a spring and a movable electrode connecting piece. The top end of the insulating rod is connected with the upper shell, and the bottom end of the insulating rod is provided with the lower shell. According to the invention, the coil of the voice coil motor is electrified, so that the coil of the voice coil motor generates a driving force magnetic field under the action of current, the magnet generates an induced electromotive force, and under the action of the induced electromotive force, the movable electrode moves in the direction perpendicular to the current direction of the coil of the voice coil motor because the current of the coil of the voice coil motor is different; therefore, the relative area between the movable electrode and the fixed electrode is changed, the capacity of the capacitor can be rapidly changed, and compared with an existing variable vacuum capacitor, the variable vacuum capacitor has the advantages of being high in adjusting speed (50-500 ms) and high in position accuracy.

The invention relates to the technical field of the voice coil manufacturing, and specifically discloses a winding assembly and automatic voice coil production equipment. The winding assembly comprises a voice gauge winding positioning mechanism and a top tightening mechanism; the voice gauge winding positioning mechanism comprises a winding rotating shaft, a positioning slot for placing a voice gauge is arranged at a first end of the winding rotating shaft; the top tightening mechanism and the voice gauge winding positioning mechanism are opposite to each other; the top tightening mechanism comprises a top tightening sleeve; an electromagnet base fixedly connected with one end, far away from the positioning slot, of the top tightening sleeve; and an electromagnet top block in sliding connection with one end, close to the positioning slot, of the top tightening sleeve, wherein the electromagnet top block is close to of far away from the positioning slot under the magnetic force effectbetween the electromagnet top block and the electromagnet base. The invention provides a winding assembly and the automatic voice coil production equipment. Through the top tightening way of the cooperation of the dual electromagnets, the clamping requirement of the voice gauge is satisfied, and the winding assembly has the advantages of being simple in structure and low in cost.

A hard disk drive bypass channel architecture incorporates enhanced cooling for voice coil motors. A cooling slot formed in a bypass channel component that is adjacent to the VCM alleviates VCM overheating problems. The slot compromises airflow from the bypass channel to provide sufficient secondary flow to cool the VCM and actuator coil area. The slot may be formed in the integrated wall of the spoiler or diverter. The spoiler has an extension in which the cooling slot is formed.